Engine Cylinder head inlet valve. Porsche 930 / 964  ❭  93010540901

Engine cylinder head inlet valve
Manufactured to OEM specifications, this valve matches the factory dimensions, seat angle, and stem diameter for perfect sealing and valve timing accuracy. Built from high-grade heat-resistant steel, it delivers excellent thermal stability and wear resistance, ideal for the demanding environment of Porsche’s high-revving flat-six engines.

Fits:
Porsche 964 C2/C4 3.6L 1990-94
Porsche 911 3.3L Turbo 1978-89
911 (964), 3.3 Turbo M 30.69
911 (964), 3.3 Turbo S M 30.69S
911 (964), 3.6 Carrera M 64.01/M 64.02
911 (964), 3.6 Carrera M 64.01/M 64.02
911 (964), 3.6 Carrera 4 M 64.01
911 (964), 3.6 Carrera RS M 64.03
911 (964), 3.6 Turbo M 64.50
911 Cabriolet (964), 3.6 Carrera M 64.01/M 64.02
911 Cabriolet (964), 3.6 Carrera M 64.01/M 64.02
911 Cabriolet (964), 3.6 Carrera 4 M 64.01
911 Speedster (964), 3.6 CarreraM 64.01/M 64.02
911 Speedster (964), 3.6 CarreraM 64.01/M 64.02
911 Targa (964), 3.6 Carrera M 64.01/M 64.02
911 Targa (964), 3.6 Carrera M 64.01/M 64.02
911 Targa (964), 3.6 Carrera 4 M 64.01

Valve head diameter 9,00 mm
Valve stem diameter 9,00 mm
Valve shaft length 110,10 mm
Valve seat angle 45 °

Diagram Ref No 11.

Function:
The inlet valve controls the flow of air-fuel mixture into the combustion chamber. Proper sealing and timing are essential for maintaining compression, combustion efficiency, and overall power output. A high-quality OE Match valve ensures consistent intake airflow, reliable operation, and long engine life.

Why & When Replacement Matters

Why: Over time, inlet valves experience wear from heat, carbon build up, and mechanical stress, which can lead to reduced compression, power loss, and rough engine operation.
When: During engine rebuilds or cylinder head servicing If there are signs of valve leakage, pitting, or stem wear.  When experiencing loss of power, misfires, or compression imbalance. As preventive maintenance on high-mileage engines or performance builds.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93010540901

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